[Inclosure Numbers 1.]

Estimate for a wooden sewer through Camp Douglas, in Chicago, and leading thence into Lake Michigan; also for privies or sinks connected therewith and for the supply of water for the camp.

Feet, B. M.

1. A sewer 2,600 feet long, 8 inches wide at the bottom, 2 feet wide at the top, and 2 1/2 high:

Bottom plank, 2 inches by 12 inches, any length. . . . . . . . 5,200

Side plank, 2 inches thick, 16 feet long. . . . . . . . . . . . . . . . 28,000

Top plank, 2 inches thick, 14 feet long. . . . . . . . . . . . . . . . . 12,500

Inner bottom board, 1 inch by 8 inch wide. . . . . . . . . . . . . . . 1,800

Battens for sides, 1 inch by 6 inches, 16 feet long. . . . . 7,000

Battens for top, 1 inch by 6 inches, 14 feet long. . . . . . . 3,300

Rib-bands at upper corners, 2 inches by 4 inches. . . . . . . . 3,500

2. A sever 650 feet long, 8 inches wide at bottom, 18 inches top, 20 inches high:

Bottom plank, 2 inches by 12 inches. . . . . . . . . . . . . . . . . . . . 1,300

Sides and top, 2-inch plank, any length and width. . . . . . 7,800

Inner bottom board, 1 inch by 8 inches. . . . . . . . . . . . . . . . . 450

Battens, 1 inch by 6 inches. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,000

Rib-bands, 2 inches by 4 inches. . . . . . . . . . . . . . . . . . . . . . . . 900

Braces, across the top (both sewers). . . . . . . . . . . . . . . . . . . 900

3. Box drain, 10 inches by 12 inches inside, 1,000 feet long:

Sides and top, 2 inches by 14 inches. . . . . . . . . . . . . . . . . . . 7,000 Bottom, 2 inches by 10 inches. . . . . . . . . . . . . . . . . . . . . . . . . . 1,000 4. Five man-holes for access to sewer in deep excavation:

Plank, 2-inch, 16 feet long. . . . . . . . . . . . . . . . . . . . . . . . . . . 1,000

Uprights for corners, 2 inches by 4 inches, 16 feet. . . . 125

5. Four catch basins, for admitting surface drainage:

Plank, 2-inch, 16 feet long. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,000

Corners, 2 inches by 4 inches, 16 feet long. . . . . . . . . . . . 125

6. Ten privies, each 16 by 30, with water-tight soil box:

Planks for soil boxes, 2-inch, 16 feet long. . . . . . . . . . . . 4,000

Sills, 6 inches by 6 inches, 16 feet long. . . . . . . . . . . . . . 3,360

Joists, 2 inches by 10 inches, 16 feet long. . . . . . . . . . . . 1,120

Common boards, 1-inch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23,000

Studding, 2 inches by 4 inches. . . . . . . . . . . . . . . . . . . . . . . . . 3,000

---------

118,380

118,380 feet of lumber, at $11, delivered. . . . . . . . . . . . . . $1,302. 18

5,000 pounds of nails and spikes, at 4 cents. . . . . . . . . . . 200. 00

If the deep excavation from the lake to the camp fence is done by contract instead of prison labor it will cost as follows:

1,200 cubic yards, 14 to 19 feet deep, quicksand bottom, and replacing same at 50 cents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,200. 00

-----------

2,702. 18

The sides of the trench must be lined with 2-inch plank, braced across during the progress of the work to prevent caving in.

Water supply:

2,060 feet of 3-inch cast-iron pipe laid, the trenching to be done by prisoners, at 50-cents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,030. 00

800 feet of 12-inch lead pipe, at 40 cents. . . . . . . . . . . . . 320. 00

Taking up and resetting 8 of the present hydrants with box leading to sewer, at $5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40. 00

Pipe and cocks and plumbing for supplying the soil boxes of the privies with water and for flushing them out, 10 privies,

at $4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40. 00

Three tanks, of 500 gallons, for flushing out the sewers, with sewer connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75. 00

Water connection of same, at $5 each. . . . . . . . . . . . . . . . . . . 15. 00

-----------

4,222. 18

In the above estimate all earth-work inside the camps is supposed to be done by prison labor. It is quite probable that part, perhaps most, of the carpenter's work will have to be done either mechanics by the day or by contract. The sewer, 3,250 feet long, could probably be laid mostly by dX, except the part outside the camp, with proper superintendence.

Laying the sewer outside the camp in the deep trench, 850 feet, at 10 cents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85. 00